Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é o sobrenome de Michael?
 ###Tabelas: CREATE TABLE pool_3 (pool_3_id AUTO_INCREMENT PRIMARY KEY, Team VARCHAR, P INT, W INT, D INT, L INT, Tries for INT, Tries against INT, Try diff VARCHAR, Points for INT, Points against INT, Points diff VARCHAR, Pts INT) CREATE TABLE player_roster (player_roster_id AUTO_INCREMENT PRIMARY KEY, Surname VARCHAR, First VARCHAR, D.O.B. VARCHAR, Bats VARCHAR, Throws VARCHAR, Position VARCHAR) CREATE TABLE main_issuers (main_issuers_id AUTO_INCREMENT PRIMARY KEY, Currency VARCHAR, Country VARCHAR, Generic Name or Nickname VARCHAR, Rating ( S&P / Moodys ) VARCHAR, Negotiable debt at mid-2005 ( US dollar bn equivalent) INT, Government financial liabilities as % of GDP (end 2003 - source : OECD ) VARCHAR, Issuer VARCHAR, Internet site VARCHAR) CREATE TABLE test_cricket (test_cricket_id AUTO_INCREMENT PRIMARY KEY, Runs VARCHAR, Match VARCHAR, Stadium VARCHAR, City/Country VARCHAR, Year VARCHAR) CREATE TABLE middle_east (middle_east_id AUTO_INCREMENT PRIMARY KEY, Network VARCHAR, Origin of Programming VARCHAR, Language VARCHAR, Genre VARCHAR, Service VARCHAR)  
SELECT Surname FROM player_roster WHERE First = michael